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Old 27th December 2004, 11:50 PM   #411
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Default S-5 Electronics K-12M Tube Amp (back)

And here is a shot of the back.
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Old 30th December 2004, 07:54 AM   #412
rdf is offline rdf  Canada
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Default Mullard 3-3

First tube project, finally done save a bit of time constant tuning and wiring out the power switch. The brass block rests on rubber bumpers and isolates PS TX vibrations from the chassis and the tubes. The outsides:
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Old 30th December 2004, 07:57 AM   #413
rdf is offline rdf  Canada
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Default Mullard 3-3

And the insides. No electrolytics, all ground plane, no hookup wire from output stage PS cap to input jack. Measures surprisingly well and sounds nice so far as the Black Gates reform.
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Old 30th December 2004, 01:38 PM   #414
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Default Re: S-5 Electronics K-12M Tube Amp (front)

Quote:
Originally posted by gmilitano
I have finally completed my S-5 Electronics K-12M Tube Amp.

Here is a picture of the front
hey gio-

generally you want to orient the power trannie core at a right angle to the output tranformer cores to avoid EMF coupling and noise...it looks like you have enough real estate for it not to be a problem but something to bear in mind for future projects...

nice work BTW!
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Old 30th December 2004, 02:21 PM   #415
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Default Re: Re: S-5 Electronics K-12M Tube Amp (front)

Quote:
Originally posted by noisenyc


hey gio-

generally you want to orient the power trannie core at a right angle to the output tranformer cores to avoid EMF coupling and noise...it looks like you have enough real estate for it not to be a problem but something to bear in mind for future projects...

nice work BTW!

Thanks for the tip. I did not know that. I have the space, so I may move it around when I get to doing some mods.

Regards,
Gio.
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Old 1st January 2005, 07:55 PM   #416
JochenH is offline JochenH  Germany
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Default My St35 from www.diytube.com

Hi all,

this is my first DIY tube amp. It's based on the ST35 project from http://www.diytube.com with a microcontroller controlled relay attenuator, bias measurement and of course it is remote controlled

Click the image to open in full size.

Jochen
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Old 5th January 2005, 11:25 PM   #417
firekat is offline firekat  United States
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That's pretty nice! I would say excellent over and beyond for the first project.

How does it sound? What kind of work did you have to do for the remote control and display?
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Old 8th January 2005, 06:43 PM   #418
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well... here's my design;
a preamp using SRPP topology, about 20dB gain, first it was constructed using 6CB6 but now i have changed to E88CC, they sound slightly better after all.. but 6CB6 ain't horseshit 8-)
the chassis was made with a thin plexifront, just to make it look more like the Norwegian "Electrocompaniet"-gear, i will change the green LED to a blue one later..
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Old 8th January 2005, 07:22 PM   #419
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and the guts:
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Old 13th January 2005, 10:25 PM   #420
tyor is offline tyor  Norway
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hallo here is my amp a SE A2 811A driven by a 807 in triode mode as catodefollover. and some nise EAM86 in the front to measure the signal. power out ca 2x 15W. Im now busy building a SE A2 250TH with 300B as driver. that wil give me at last 40W out
TYOR
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